Light blocking sheet, light blocking element, optical element, imaging lens assembly and lens module

ABSTRACT

A light blocking sheet includes a first surface, a second surface, an inner annular surface and an outer annular surface. The second surface is corresponding to the first surface. The inner annular surface connects the first surface and the second surface, and forms an inner opening. The outer annular surface connects an edge of the first surface and an edge of the second surface, and includes at least three notches disposed on the outer annular surface and at least three arc surfaces located on the outer annular surface, wherein the at least three notches and the at least three arc surfaces are alternately arranged on the outer annular surface, and the at least three arc surfaces are coaxial and have different arc lengths.

RELATED APPLICATIONS

This application is a continuation of the application Ser. No.14/960,560, filed Dec. 7, 2015, now U.S. Pat. No. 10,222,516, whichclaims priority to Taiwan Application Serial Number 104216638, filedOct. 16, 2015, which is herein incorporated by reference.

BACKGROUND Technical Field

The present disclosure relates to a light blocking sheet, a lightblocking element, an optical element, an imaging lens assembly and alens module. More particularly, the present disclosure relates to alight blocking sheet, a light blocking element, an optical element, animaging lens assembly and a lens module for preventing a miss operation.

Description of Related Art

Recently, the portable devices, such as smart phone and pad, aredeveloped rapidly and ubiquitous in the human life. The imaging lensdisposed therein is thus becomes growth industry. With the improvementof the technology, more and more demands for high qualities of imaginglens come out. Therefore, in addition to improving the quality ofimaging lens in optical design field, the precision of manufacturing andassembling processes are needed to be improved too.

The conventional lens module usually includes lens elements and aoptical element, such as a light blocking sheet, a light blockingelement or a spacer, disposed between the lens elements. However,because the sizes of the lens elements and the optical element becomesmaller while the size of the lens module becomes small, thus thedifficulties of assembling process as well as the difficulties ofmanufacturing process increase.

Base on the aforementioned problems, how to improve the structure of thelight blocking sheet, the light blocking element, the optical element,etc., the precision of the assembling, and the quality of the imaginglens become a pursuit target for practitioners.

SUMMARY

According to one aspect of the present disclosure, a light blockingsheet includes a first surface, a second surface, an inner annularsurface and an outer annular surface. The second surface iscorresponding to the first surface. The inner annular surface connectsthe first surface and the second surface, and forms an inner opening.The outer annular surface connects an edge of the first surface and anedge of the second surface, and includes at least three notches and atleast three arc surfaces. The at least three notches are disposed on theouter annular surface. The at least three arc surfaces are located onthe outer annular surface. The at least three notches and the at leastthree arc surfaces are alternately arranged on the outer annularsurface, and the at least three arc surfaces are coaxial and havedifferent arc lengths.

According to another aspect of the present disclosure, an imaging lensassembly includes the light blocking sheet according to theaforementioned aspect.

According to further another aspect of the present disclosure, a lensmodule includes the imaging lens assembly according to theaforementioned aspect and an image sensor, wherein the image sensor isdisposed on an image surface of the imaging lens assembly.

According to still another aspect of the present disclosure, a lightblocking element includes a first surface, a second surface, an innerannular surface and an outer annular surface. The second surface iscorresponding to the first surface. The inner annular surface connectsthe first surface and the second surface, and forms an inner opening.The outer annular surface connects an edge of the first surface and anedge of the second surface, and includes three notches and three arcsurfaces. The three notches are disposed on the outer annular surface.The three arc surfaces are located on the outer annular surface. Thethree notches and the three arc surfaces are alternately arranged on theouter annular surface, and the three arc surfaces are coaxial and havedifferent arc lengths.

According to yet another aspect of the present disclosure, an imaginglens assembly includes the light blocking element according to theaforementioned aspect.

According to further another aspect of the present disclosure, anoptical element includes a first surface, a second surface and an outerannular surface. The second surface is corresponding to the firstsurface. The outer annular surface connects an edge of the first surfaceand an edge of the second surface, and includes three notches and threearc surfaces. The three notches are disposed on the outer annularsurface, wherein a virtual outer circular arc line is formed between twoends of each of the notches, the virtual outer circular arc lines arecoaxial, there is one connecting line which is formed between eachmiddle point of any two virtual outer circular arc lines passing througha center of the optical element. The three arc surfaces are located onthe outer annular surface, wherein the three notches and the three arcsurfaces are alternately arranged on the outer annular surface, and thethree arc surfaces are coaxial and have different arc lengths.

According to still another aspect of the present disclosure, an imaginglens assembly includes the optical element according to theaforementioned aspect.

According to yet another aspect of the present disclosure, a lens moduleincludes the imaging lens assembly according to the aforementionedaspect and an image sensor, wherein the image sensor is disposed on animage surface of the imaging lens assembly.

BRIEF DESCRIPTION OF THE DRAWINGS

FIG. 1 is a three dimensional view of a light blocking sheet accordingto the 1 st embodiment of the present disclosure;

FIG. 2A is a schematic view of the first surface of the light blockingsheet according to the 1st embodiment in FIG. 1;

FIG. 2B is a schematic view of the second surface of the light blockingsheet according to the 1st embodiment in FIG. 1;

FIG. 2C is a cross-sectional view of the light blocking sheet accordingto the 1st embodiment of FIG. 1;

FIG. 3A is a schematic view of the first surface of a light blockingsheet according to the 2nd embodiment of the present disclosure;

FIG. 3B is a schematic view of the second surface of the light blockingsheet according to the 2nd embodiment in FIG. 3A;

FIG. 3C is a cross-sectional view of the light blocking sheet accordingto the 2nd embodiment of FIG. 3A;

FIG. 4A is a schematic view of the first surface of a light blockingsheet according to the 3rd embodiment of the present disclosure;

FIG. 4B is a schematic view of the second surface of the light blockingsheet according to the 3rd embodiment in FIG. 4A;

FIG. 4C is a cross-sectional view of the light blocking sheet accordingto the 3rd embodiment of FIG. 4A;

FIG. 5A is a schematic view of the first surface of a light blockingsheet according to the 4th embodiment of the present disclosure;

FIG. 5B is a schematic view of the second surface of the light blockingsheet according to the 4th embodiment in FIG. 5A;

FIG. 5C is a cross-sectional view of the light blocking sheet accordingto the 4th embodiment of FIG. 5A;

FIG. 6 is a three dimensional view of a light blocking element accordingto the 5th embodiment of the present disclosure;

FIG. 7A is a schematic view of the first surface of the light blockingelement according to the 5th embodiment in FIG. 6;

FIG. 7B is a schematic view of the second surface of the light blockingelement according to the 5th embodiment in FIG. 6;

FIG. 7C is a cross-sectional view of the light blocking elementaccording to the 5th embodiment of FIG. 6;

FIG. 7D is a schematic view of a manufacturing process of the lightblocking element according to the 5th embodiment of FIG. 6;

FIG. 8A is a schematic view of the first surface of an optical elementaccording to the 6th embodiment of the present disclosure;

FIG. 8B is a schematic view of the second surface of the optical elementaccording to the 6th embodiment in FIG. 8A;

FIG. 8C is a cross-sectional view of the optical element according tothe 6th embodiment of FIG. 8A;

FIG. 9A is a schematic view of the first surface of a light blockingsheet according to the 7th embodiment of the present disclosure;

FIG. 9B is a schematic view of the second surface of the light blockingsheet according to the 7th embodiment in FIG. 9A;

FIG. 9C is a cross-sectional view of the light blocking sheet accordingto the 7th embodiment of FIG. 9A;

FIG. 10 is a schematic view of a lens module according to the 8thembodiment of the present disclosure;

FIG. 11 is a schematic view of a lens module according to the 9thembodiment of the present disclosure;

FIG. 12 is a schematic view of a lens module according to the 10thembodiment of the present disclosure;

FIG. 13 is a schematic view of a lens module according to the 11thembodiment of the present disclosure; and

FIG. 14 is a schematic view of a lens module according to the 12thembodiment of the present disclosure.

DETAILED DESCRIPTION

FIG. 1 is a three dimensional view of a light blocking sheet 100according to the 1st embodiment of the present disclosure. In FIG. 1,the light blocking sheet 100 includes a first surface 110, a secondsurface 120, an inner annular surface 130 and an outer annular surface140. The second surface 120 is corresponding to the first surface 110.The inner annular surface 130 connects the first surface 110 and thesecond surface 120, and forms an inner opening 131. The outer annularsurface 140 connects an edge of the first surface 110 and an edge of thesecond surface 120.

FIG. 2A is a schematic view of the first surface 110 of the lightblocking sheet 100 according to the 1st embodiment in FIG. 1. FIG. 2B isa schematic view of the second surface 120 of the light blocking sheet100 according to the 1st embodiment in FIG. 1. In detail, the outerannular surface 140 includes at least three notches 141 and at leastthree arc surfaces 143, wherein the three notches 141 are disposed onthe outer annular surface 140, the three arc surfaces 143 are located onthe outer annular surface 140. The three notches 141 and the three arcsurfaces 143 are alternately arranged on the outer annular surface 140.The three arc surfaces 143 are coaxial and have different arc lengths(according to the 1st embodiment, each arc center of the arc surfaces143 is a center 101), that is, the three notches 141 are asymmetricallydisposed on the outer annular surface 140, so that the arc surfaces 143alternately arranged between each two notches 141 has different arclengths. Therefore, it is favorable for judging a correct assemblingdirection, thus the light blocking sheet 100 in the present disclosurecan prevent a miss assembling in the assembling process. In the 1stembodiment of the present disclosure, each of the arc lengths of thethree arc surfaces 143 is 0.37 mm, 1.83 mm and 2.99 mm.

In FIGS. 2A and 2B, A depressed direction of each notch 141 extendstoward the center 101 of the light blocking sheet 100 (that is, thedepressed direction of each notch 141 extends toward the inner opening131), and contours of the notches 141 are the same, wherein the“contour” of each notch 141 means the shape formed on the outer annularsurface 140, the first surface 110 and the second surface 120 of thelight blocking sheet 100 by each notch 141. Thus, when the contours ofthe notches 141 are the same, the shape on the first surface 110 formedby each notch 141 would be the same, and the shape of the second surface120 formed by each notch 141 would be the same, too. Hence, thecomplexity of the manufacturing of the light blocking sheet 100 can bedecreased.

In FIG. 2A, when a number of the notches 141 is N, the followingcondition is satisfied: 3≤N<8. A virtual outer circular arc line 142 isformed between two ends of each of the notches 141, the virtual outercircular arc lines 142 are coaxial (according to the 1st embodiment,each arc center of the virtual outer circular arc lines 142 is thecenter 101), and there is only one connecting line which is formedbetween each middle point of any two virtual outer circular arc lines142 passing through the center 101 of the light blocking sheet 100.Therefore, the correctness for judging a correct assembling directioncan be increased.

In FIG. 2A, according to the 1st embodiment of the present disclosure, anumber of the notches 141 is N, and N=3, wherein there is one connectingline which is formed between each middle point of the two virtual outercircular arc lines 142 passing through the center 101 of the lightblocking sheet 100, the other notch 141 is located on the outer annularsurface 140 of one side of the connecting line. Therefore, it isfavorable for judging a correct assembling direction.

Further, in the three notches 141, when an angle between a middle pointof the virtual outer circular arc line 142 of the other notch 141 andthe middle point of the virtual outer circular arc line 142 of one ofthe two notches 141 which is near to the other notch 141 is θ, thefollowing condition is satisfied: 20 degrees<θ<75 degrees. Therefore,the relative location of the notches 141 is proper, so that the judgmentfor correctly assembling the light blocking sheet 100 can be increased.According to the 1st embodiment of the present disclosure, θ=60 degrees.

In FIG. 2A, when a maximal depth of each of the notches 141 is d (thatis, a maximal depressed distance of each notch 141 extends toward theinner opening 131), the following condition is satisfied: 0.03 mm<d<0.35mm. Therefore, when the light blocking sheet 100 is applied to animaging lens assembly or a lens module, the light leak from the notches141 can be prevented. Furthermore, the maximal depths of the notches 141can be the same, that is, when the contours of the notches 141 are thesame, the maximal depths of the notches 141 are also the same. Accordingto the 1st embodiment of the present disclosure, the maximal depths d ofthe notches 141 are the same, and d=0.15 mm.

FIG. 2C is a cross-sectional view of the light blocking sheet 100according to the 1st embodiment of FIG. 1. In FIG. 2C, when a thicknessof the light blocking sheet 100 is t, the following condition issatisfied: 0.01 mm<t<0.10 mm. Therefore, it is favorable for reducingthe reflection of the inner annular surface 130 due to the lightblocking sheet 100 with thinner thickness. According to the 1 stembodiment of the present disclosure, t=0.03 mm.

In FIG. 2C, when an angle between an extending direction of the innerannular surface 130 and an extending direction of a central axis X ofthe light blocking sheet 100 is β, the following condition is satisfied:15 degrees<β<55 degrees. Therefore, the ability for completely blockingthe stray light can be enhanced. According to the 1st embodiment of thepresent disclosure, β=45 degrees.

Furthermore, the inner opening 131 of the light blocking sheet 100 canbe a punching hole. Therefore, it is favorable for the manufacture ofthe light blocking sheet 100.

FIG. 3A is a schematic view of the first surface 210 of a light blockingsheet 200 according to the 2nd embodiment of the present disclosure.FIG. 3B is a schematic view of the second surface 220 of the lightblocking sheet 200 according to the 2nd embodiment in FIG. 3A. In FIGS.3A and 3B, the light blocking sheet 200 includes a first surface 210, asecond surface 220, an inner annular surface 230 and an outer annularsurface 240. The second surface 220 is corresponding to the firstsurface 210. The inner annular surface 230 connects the first surface210 and the second surface 220, and forms an inner opening 231. Theouter annular surface 240 connects an edge of the first surface 210 andan edge of the second surface 220.

In detail, according to the 2nd embodiment, the outer annular surface240 includes four notches 241 and four arc surfaces 243 (N=4), whereinthe four notches 241 are disposed on the outer annular surface 240, thefour arc surfaces 243 are located on the outer annular surface 240,wherein the four notches 241 and the four arc surfaces 243 arealternately arranged on the outer annular surface 240. At least threearc surface 243 are coaxial and have different arc lengths (according tothe 2nd embodiment, each arc center of the arc surfaces 243 is a center201), that is, the four notches 241 are asymmetrically disposed on theouter annular surface 240, so that the arc surfaces 243 alternatelyarranged between each two notches 241 has different arc lengths.Therefore, it is favorable for judging a correct assembling direction,thus the light blocking sheet 200 in the present disclosure can preventa miss assembling in the assembling process. In the 2nd embodiment ofthe present disclosure, each of the arc lengths of the four arc surfaces243 is 0.16 mm, 1.10 mm, 1.10 mm and 2.04 mm.

According to the 2nd embodiment, a virtual outer circular arc line 242is formed between two ends of each of the notches 241, the virtual outercircular arc lines 242 are coaxial (according to the 2nd embodiment,each arc center of the virtual outer circular arc lines 242 is thecenter 201), wherein, in FIG. 3A, there is a connecting line which isformed between each middle point of two virtual outer circular arc lines242 of two notches 241 passing through the center 201 of the lightblocking sheet 200, and for the other two notches 241, one notch 241 isnear to one of the two notches 241 which forms the connecting line, thusan angle between a middle point of the virtual outer circular arc line242 of the other notch 241 of the other two notches 241 and the middlepoint of the virtual outer circular arc line 242 of the notch 241 whichis near to the other notch 241 is θ, θ=45 degrees.

According to the 2nd embodiment of the present disclosure, a maximaldepth of each of the notches 241 is d (that is, a maximal depresseddistance of each notch 241 extends toward the inner opening 231), thecontours of the notches 241 are the same, the maximal depths d of thenotches 241 are also the same, d=0.15 mm.

FIG. 3C is a cross-sectional view of the light blocking sheet 200according to the 2nd embodiment of FIG. 3A. In FIG. 3C, according to the2nd embodiment of the present disclosure, a thickness of the lightblocking sheet 200 is t, and t=0.022 mm.

In FIG. 3C, according to the 2nd embodiment of the present disclosure,an angle between an extending direction of the inner annular surface 230and an extending direction of a central axis X of the light blockingsheet 200 is β, and β=30 degrees.

Furthermore, the inner opening 231 of the light blocking sheet 200 canbe a punching hole.

FIG. 4A is a schematic view of the first surface 310 of a light blockingsheet 300 according to the 3rd embodiment of the present disclosure.FIG. 4B is a schematic view of the second surface 320 of the lightblocking sheet 300 according to the 3rd embodiment in FIG. 4A. In FIGS.4A and 4B, the light blocking sheet 300 includes a first surface 310, asecond surface 320, an inner annular surface 330 and an outer annularsurface 340. The second surface 320 is corresponding to the firstsurface 310. The inner annular surface 330 connects the first surface310 and the second surface 320, and forms an inner opening 331. Theouter annular surface 340 connects an edge of the first surface 310 andan edge of the second surface 320.

In detail, according to the 3rd embodiment, the outer annular surface340 includes three notches 341 and three arc surfaces 343 (N=3), whereinthe three notches 341 are disposed on the outer annular surface 340, thethree arc surfaces 343 are located on the outer annular surface 340, thethree notches 341 and the three arc surfaces 343 are alternatelyarranged on the outer annular surface 340. The three arc surface 343 arecoaxial and have different arc lengths (according to the 3rd embodiment,each arc center of the arc surfaces 343 is a center 301), that is, thethree notches 341 are asymmetrically disposed on the outer annularsurface 340, so that the arc surfaces 343 alternately arranged betweeneach two notches 341 has different arc lengths. Therefore, it isfavorable for judging a correct assembling direction, thus the lightblocking sheet 300 in the present disclosure can prevent a missassembling in the assembling process. In the 3rd embodiment of thepresent disclosure, each of the arc lengths of the three arc surfaces343 is 0.30 mm, 1.56 mm and 3.75 mm.

According to the 3rd embodiment, a virtual outer circular arc line 342is formed between two ends of each of the notches 341, the virtual outercircular arc lines 342 are coaxial (according to the 3rd embodiment,each arc center of the virtual outer circular arc lines 342 is thecenter 301), wherein a minimal angle between each two middle points ofeach two virtual outer circular arc lines 342 which are adjacent to eachother is α, and α=45 degrees.

According to the 3rd embodiment of the present disclosure, a maximaldepth of each of the notches 341 is d (that is, a maximal depresseddistance of each notch 341 extends toward the inner opening 331), thecontours of the notches 341 are the same, the maximal depths d of thenotches 341 are also the same, d=0.15 mm.

FIG. 4C is a cross-sectional view of the light blocking sheet 300according to the 3rd embodiment of FIG. 4A. In FIG. 4C, according to the3rd embodiment of the present disclosure, a thickness of the lightblocking sheet 300 is t, and t=0.041 mm.

In FIG. 4C, according to the 3rd embodiment of the present disclosure,an angle between an extending direction of the inner annular surface 330and an extending direction of a central axis X of the light blockingsheet 300 is β, and β=40 degrees.

Furthermore, the inner opening 331 of the light blocking sheet 300 canbe a punching hole.

FIG. 5A is a schematic view of the first surface 410 of a light blockingsheet 400 according to the 4th embodiment of the present disclosure.FIG. 5B is a schematic view of the second surface 420 of the lightblocking sheet 400 according to the 4th embodiment in FIG. 5A. In FIGS.5A and 5B, the light blocking sheet 400 includes a first surface 410, asecond surface 420, an inner annular surface 430 and an outer annularsurface 440. The second surface 420 is corresponding to the firstsurface 410. The inner annular surface 430 connects the first surface410 and the second surface 420, and forms an inner opening 431. Theouter annular surface 440 connects an edge of the first surface 410 andan edge of the second surface 420.

In detail, according to the 4th embodiment, the outer annular surface440 includes seven notches 441 and seven arc surfaces 443 (N=7), whereinthe seven notches 441 are disposed on the outer annular surface 440, theseven arc surfaces 443 are located on the outer annular surface 440,wherein the seven notches 441 and the seven arc surfaces 443 arealternately arranged on the outer annular surface 440. At least four arcsurfaces 443 are coaxial and have different arc lengths (according tothe 4th embodiment, each arc center of the arc surfaces 443 is a center401), that is, the seven notches 441 are asymmetrically disposed on theouter annular surface 440, so that at least four arc surfaces 443alternately arranged between each two notches 441 has different arclengths. Therefore, it is favorable for judging a correct assemblingdirection, thus the light blocking sheet 400 in the present disclosurecan prevent a miss assembling in the assembling process. In the 4thembodiment of the present disclosure, each of the arc lengths of theseven arc surfaces 443 is 0.0897 mm, 0.0897 mm, 0.0897 mm, 0.0897 mm,0.404 mm, 0.613 mm and 1.66 mm.

According to the 4th embodiment, a virtual outer circular arc line 442is formed between two ends of each of the notches 441, the virtual outercircular arc lines 442 are coaxial (according to the 4th embodiment,each arc center of the virtual outer circular arc lines 442 is thecenter 401), wherein, in FIG. 5A, there is a connecting line which isformed between each middle point of two virtual outer circular arc lines442 of two notches 441 passing through the center 401 of the lightblocking sheet 400, and for others four notches 441, each two notches441 are symmetrically located on two sides of the connecting line anddisposed on the outer annular surface 440. The other notch 441 isdisposed on the outer annular surface 440 which is on one side of theconnecting line, and is near to one of the notches 441 having theconnecting line passing through the center 401 of the light blockingsheet 400, so that an angle between a middle point of the virtual outercircular arc line 442 of the other notch 441 and the middle point of thevirtual outer circular arc line 442 of the notch 441 which is near tothe other notch 441 is ω, ω=50 degrees. Therefore, it is favorable forjudging a correct assembling direction by the asymmetrical arrangementof the notches.

According to the 4th embodiment of the present disclosure, a maximaldepth of each of the notches 441 is d (that is, a maximal depresseddistance of each notch 441 extends toward the inner opening 431), thecontours of the notches 441 are the same, the maximal depths d of thenotches 441 are also the same, d=0.15 mm.

FIG. 5C is a cross-sectional view of the light blocking sheet 400according to the 4th embodiment of FIG. 5A. In FIG. 5C, according to the4th embodiment of the present disclosure, a thickness of the lightblocking sheet 400 is t, and t=0.03 mm.

In FIG. 5C, according to the 4th embodiment of the present disclosure,an angle between an extending direction of the inner annular surface 430and an extending direction of a central axis X of the light blockingsheet 400 is β, and β=15 degrees.

Furthermore, the inner opening 431 of the light blocking sheet 400 canbe a punching hole.

FIG. 6 is a three dimensional view of a light blocking element 500according to the 5th embodiment of the present disclosure. In FIG. 6,the light blocking element 500 is a spacer. The light blocking element500 includes a first surface 510, a second surface 520, an inner annularsurface 530 and an outer annular surface 540. The second surface 520 iscorresponding to the first surface 510. The inner annular surface 530connects the first surface 510 and the second surface 520, and forms aninner opening 531. The outer annular surface 540 connects an edge of thefirst surface 510 and an edge of the second surface 520.

FIG. 7A is a schematic view of the first surface 510 of the lightblocking element 500 according to the 5th embodiment in FIG. 6. FIG. 7Bis a schematic view of the second surface 520 of the light blockingelement 500 according to the 5th embodiment in FIG. 6. In detail, theouter annular surface 540 includes at least three notches 541 and atleast three arc surfaces 543 (N=3), wherein the three notches 541 aredisposed on the outer annular surface 540, the three arc surfaces 543are located on the outer annular surface 540, the three notches 541 andthe three arc surfaces 543 are alternately arranged on the outer annularsurface 540. The three arc surface 543 are coaxial and have differentarc lengths (according to the 5th embodiment, each arc center of the arcsurfaces 543 is a center 501), that is, the three notches 541 areasymmetrically disposed on the outer annular surface 540, so that thearc surfaces 543 alternately arranged between each two notches 541 hasdifferent arc lengths. Therefore, it is favorable for judging a correctassembling direction, thus the light blocking element 500 in the presentdisclosure can prevent a miss assembling in the assembling process. Inthe 5th embodiment of the present disclosure, each of the arc lengths ofthe three arc surfaces 543 is 0.91 mm, 3.24 mm and 5.57 mm.

According to the 5th embodiment, a virtual outer circular arc line 542is formed between two ends of each of the notches 541, the virtual outercircular arc lines 542 are coaxial (according to the 5th embodiment,each arc center of the virtual outer circular arc lines 542 is thecenter 501), wherein, in FIG. 7A, there is a connecting line which isformed between each middle point of two virtual outer circular arc lines542 of two notches 541 passing through the center 501 of the lightblocking element 500, an angle between a middle point of the virtualouter circular arc line 542 of the other notch 541 and the middle pointof the virtual outer circular arc line 542 of one of the two notches 541which is near to the other notch 541 is θ, θ=60 degrees.

According to the 5th embodiment, the three notches 541 are straightcutting notches. That is, each notch 541 is formed into planar on theouter annular surface 540, and is formed into a straight edge on thefirst surface 510 and the second surface 520, respectively. Therefore,the manufacturing efficiency of the light blocking element 500 can beincreased. Further, a maximal depth of each of the notches 541 is d(that is, a maximal distance from the middle point of the virtual outercircular arc line 542 of each notch 541 extends to the outer annularsurface 540), the contours of the notches 541 are the same, the maximaldepths d of the notches 541 are also the same, d=0.11 mm.

FIG. 7C is a cross-sectional view of the light blocking element 500according to the 5th embodiment of FIG. 6. In FIG. 7C, according to the5th embodiment of the present disclosure, a thickness of the lightblocking element 500 is t, and t=0.235 mm.

In FIG. 7C, according to the 5th embodiment of the present disclosure,an angle between an extending direction of the inner annular surface 530and an extending direction of a central axis X of the light blockingelement 500 is β, and β=15 degrees.

FIG. 7D is a schematic view of a manufacturing process of the lightblocking element 500 according to the 5th embodiment of FIG. 6. In FIG.7D, the light blocking element 500 can further include a gate end 545located on one of the two notches 541 which have the connecting lineformed between each middle point of two virtual outer circular arc lines542 thereof passing through the center 501 of the light blocking element500. Corresponding to a gate end 545 of a mold (not shown), thecomplexity of the design of the mold can be decreased. In detail, in the5th embodiment, the light blocking element 500 includes two gate ends545 located on each of the two notches 541 which have the connectingline which is formed between each middle point of two virtual outercircular arc lines 542 of two notches 541 passing through the center 501of the light blocking element 500, respectively. Hence, the complexityof the design of the mold can be decreased, and the forming accuracy ofthe light blocking element 500 can also be increased.

FIG. 8A is a schematic view of the first surface 610 of an opticalelement 600 according to the 6th embodiment of the present disclosure.FIG. 8B is a schematic view of the second surface 620 of the opticalelement 600 according to the 6th embodiment in FIG. 8A. FIG. 8C is across-sectional view of the optical element 600 according to the 6thembodiment of FIG. 8A. In FIG. 8A, the optical element 600 is an imaginglens element. The optical element 600 includes a first surface 610, asecond surface 620 and an outer annular surface 640. The second surface620 is corresponding to the first surface 610. The outer annular surface640 connects an edge of the first surface 610 and an edge of the secondsurface 620.

In FIGS. 8A and 8B, the outer annular surface 640 includes three notches641 and three arc surfaces 643 (N=3), wherein the three notches 641 aredisposed on the outer annular surface 640, the three arc surfaces 643are located on the outer annular surface 640, the three notches 641 andthe three arc surfaces 643 are alternately arranged on the outer annularsurface 640. The three arc surface 643 are coaxial and have differentarc lengths (according to the 6th embodiment, each arc center of the arcsurfaces 643 is a center 601, and the central axis X of the opticalelement 600 passes through the center 601 which is on the first surface610 and the second surface 620), that is, the three notches 641 areasymmetrically disposed on the outer annular surface 640, so that thearc surfaces 643 alternately arranged between each two notches 641 hasdifferent arc lengths. Therefore, it is favorable for judging a correctassembling direction, thus the optical element 600 in the presentdisclosure can prevent a miss assembling in the assembling process. Inthe 6th embodiment of the present disclosure, each of the arc lengths ofthe three arc surfaces 643 is 0.60 mm, 6.88 mm and 10.03 mm.

According to the 6th embodiment, a virtual outer circular arc line 642is formed between two ends of each of the notches 641, the virtual outercircular arc lines 642 are coaxial (according to the 6th embodiment,each arc center of the virtual outer circular arc lines 642 is thecenter 601), wherein, in FIG. 8A, there is a connecting line which isformed between each middle point of two virtual outer circular arc lines642 of two notches 641 passing through the center 601 of the opticalelement 600, an angle between a middle point of the virtual outercircular arc line 642 of the other notch 641 and the middle point of thevirtual outer circular arc line 642 of one of the two notches 641 whichis near to the other notch 641 is θ, θ=45 degrees.

According to the 6th embodiment, the three notches 641 are straightcutting notches. That is, each notch 641 is formed into planar on theouter annular surface 640, and is formed into a straight edge on thefirst surface 610 and the second surface 620, respectively. A maximaldepth of each of the notches 641 is d (that is, a maximal distance fromthe middle point of the virtual outer circular arc line 642 of eachnotch 641 extends to the outer annular surface 640), the contours of thenotches 641 are the same, the maximal depths d of the notches 641 arealso the same, d=0.2 mm.

FIG. 9A is a schematic view of the first surface 710 of a light blockingsheet 700 according to the 7th embodiment of the present disclosure.FIG. 9B is a schematic view of the second surface 720 of the lightblocking sheet 700 according to the 7th embodiment in FIG. 9A. In FIGS.9A and 9B, the light blocking sheet 700 includes a first surface 710, asecond surface 720, an inner annular surface 730 and an outer annularsurface 740. The second surface 720 is corresponding to the firstsurface 710. The inner annular surface 730 connects the first surface710 and the second surface 720, and forms an inner opening 731. Theouter annular surface 740 connects an edge of the first surface 710 andan edge of the second surface 720.

In FIGS. 9A and 9B, the outer annular surface 740 includes three notches741 and three arc surfaces 743 (N=3), wherein the three notches 741 aredisposed on the outer annular surface 740, the three arc surfaces 743are located on the outer annular surface 740, the three notches 741 andthe three arc surfaces 743 are alternately arranged on the outer annularsurface 740. The three arc surfaces 743 are coaxial and have differentarc lengths (according to the 7th embodiment, each arc center of the arcsurfaces 743 is a center 701), that is, the three notches 741 areasymmetrically disposed on the outer annular surface 740, so that thearc surfaces 743 alternately arranged between each two notches 741 hasdifferent arc lengths. Therefore, it is favorable for judging a correctassembling direction, thus the light blocking sheet 700 in the presentdisclosure can prevent a miss assembling in the assembling process. Inthe 7th embodiment of the present disclosure, each of the arc lengths ofthe three arc surfaces 743 is 0.25 mm, 1.09 mm and 2.56 mm.

According to the 7th embodiment, a virtual outer circular arc line 742is formed between two ends of each of the notches 741, the virtual outercircular arc lines 742 are coaxial (according to the 7th embodiment,each arc center of the virtual outer circular arc lines 742 is thecenter 701), wherein, in FIG. 9A, there is a connecting line which isformed between each middle point of two virtual outer circular arc lines742 of two notches 741 passing through the center 701 of the lightblocking sheet 700, an angle between a middle point of the virtual outercircular arc line 742 of the other notch 741 and the middle point of thevirtual outer circular arc line 742 of one of the two notches 741 whichis near to the other notch 741 is θ, θ=70 degrees.

According to the 7th embodiment, the three notches 741 are straightcutting notches. That is, each notch 741 is formed into planar on theouter annular surface 740, and is formed into a straight edge on thefirst surface 710 and the second surface 720, respectively. A maximaldepth of each of the notches 741 is d (that is, a maximal distance fromthe middle point of the virtual outer circular arc line 742 of eachnotch 741 extends to the outer annular surface 740), the contours of thenotches 741 are the same, the maximal depths d of the notches 741 arealso the same, d=0.15 mm.

FIG. 9C is a cross-sectional view of the light blocking sheet 700according to the 7th embodiment of FIG. 9A. In FIG. 9C, according to the7th embodiment of the present disclosure, a thickness of the lightblocking sheet 700 is t, and t=0.03 mm.

In FIG. 9C, according to the 7th embodiment of the present disclosure,an angle between an extending direction of the inner annular surface 730and an extending direction of a central axis X of the light blockingelement 700 is β, and β=45 degrees.

FIG. 10 is a schematic view of a lens module 10 according to the 8thembodiment of the present disclosure. According to the 8th embodiment,the lens module 10 includes an imaging lens assembly (not shown) and animage sensor 880, wherein the imaging lens assembly includes a barrel800, a lens element set (not shown), an IR-cut filter 860 and a imagesurface 870. The lens element set is located in the barrel 800, theIR-cut filter 860 and the image surface 870 are located on an image sideof the lens element set in order, and the image sensor 880 is disposedon the image surface 870.

According to the 8th embodiment, the lens element set includes, in orderfrom an object side to the image side, a first lens element 810, a firstoptical element 811, a second lens element 820, a second optical element821, a third lens element 830, a third optical element 831, a fourthoptical element 832, a fourth lens element 840, a fifth optical element841 and a fifth lens element 850, wherein the first lens element 810,the second lens element 820, the third lens element 830, the fourth lenselement 840 and the fifth lens element 850 can be the optical elementwhich is disclosed in the aforementioned 6th embodiment, that is, theimaging lens element can prevent a miss assembling in the assemblingprocess. The first optical element 811, the second optical element 821,the third optical element 831, the fourth optical element 832 and thefifth optical element 841 can be the optical element which is disclosedin any one of the aforementioned 1st to 5th, and 7th embodiments. Indetail, each of the first optical element 811, the second opticalelement 821, the third optical element 831 and the fifth optical element841 is any one light blocking sheet of the 1st embodiment, the 2ndembodiment, the 3rd embodiment, the 4th embodiment and the 7thembodiment, the fourth optical element 832 is the light blocking element(spacer) of the 5th embodiment, and will not be limited thereof.Therefore, the manufacturing yield rate and the image quality can beincreased by assembling optical elements in a correct way, so that theeffect on the image quality from the stray light can be reduced.

Table 1 shows data of each lens element (810, 820, 830, 840, 850), theIR-cut filter 860 and the image surface 870, wherein the curvatureradius, the thickness and the focal length are shown in millimeters(mm), and surface numbers 0-14 represent the surfaces sequentiallyarranged from the object-side to the image-side along the optical axis.In Table 2, k represents the conic coefficient of the equation of theaspheric surface profiles. A4-A16 represent the aspheric coefficientsranging from the 4th order to the 16th order.

TABLE 1 8th Embodiment f = 3.17 mm, Fno = 2.26, HFOV = 42.4 deg. FocalSurface # Curvature Radius Thickness Material Index Abbe # Length 0Object Plano Infinity 1 Ape. Stop Plano −0.201000  2 Lens 1 1.126 ASP0.424000 Plastic 1.544 56.0 2.58 3 4.933 ASP 0.056000 4 Lens 2 −8.762ASP 0.232000 Plastic 1.660 20.4 −9.09 5 19.192 ASP 0.309000 6 Lens 3−7.618 ASP 0.303000 Plastic 1.544 56.0 −15.53 7 −78.511 ASP 0.354000 8Lens 4 3.304 ASP 0.459000 Plastic 1.534 45.3 3.12 9 −3.200 ASP 0.47200010 Lens 5 −2.868 ASP 0.320000 Plastic 1.544 56.0 −2.09 11 1.951 ASP0.250000 12 IR-cut filter Plano 0.110000 Glass 1.517 64.2 — 13 Plano0.317189 14 Image Plano — Reference wavelength is 587.6 nm (d-line).

TABLE 2 Aspheric Coefficients Surface # 2 3 4 5 6 k = −3.4877E+00−1.6277E+01 −2.8744E+01 5.9497E+01 −9.8999E+01 A4 = 2.6592E−01−2.4679E−01 −1.7788E−01 6.0773E−02 −6.0353E−01 A6 = −6.7165E−02−5.2422E−01 6.9068E−01 1.0087E+00 1.6035E+00 A8 = −4.3283E−01 2.8278E+001.4463E−01 −9.7445E−01 −7.0008E+00 A10 = 8.7853E−01 −5.7696E+00−1.4589E+00 6.6191E−01 1.8586E+01 A12 = −1.8386E+00 3.7863E+001.7466E+00 6.3247E−01 −2.4381E+01 A14 = 1.2677E+01 Surface # 7 8 9 10 11k = −9.8997E+01 −1.6040E+00 −3.0334E+01 −6.7384E−01 −2.0802E+01 A4 =−5.3400E−01 −9.8591E−02 −2.9705E−02 −4.7129E−01 −2.0813E−01 A6 =7.3794E−01 5.2380E−02 9.5658E−02 4.5535E−01 1.4668E−01 A8 = −1.6259E+00−1.2799E−01 −1.1032E−01 −1.9593E−01 −6.2385E−02 A10 = 2.3264E+009.1951E−02 6.2581E−02 5.0618E−02 1.5997E−02 A12 = −1.3544E+00−2.7488E−02 −1.8643E−02 −8.5697E−03 −2.5513E−03 A14 = 2.5963E−013.8219E−03 2.7781E−03 9.2119E−04 2.4242E−04 A16 = −2.1567E−04−1.6281E−04 −4.8198E−05 −1.0583E−05

FIG. 11 is a schematic view of a lens module 20 according to the 9thembodiment of the present disclosure. According to the 9th embodiment,the lens module 20 includes an imaging lens assembly (not shown) and animage sensor 980, wherein the imaging lens assembly includes a barrel900, a lens element set (not shown), an IR-cut filter 960 and a imagesurface 970. The lens element set is located in the barrel 900, theIR-cut filter 960 and the image surface 970 are located on an image sideof the lens element set in order, and the image sensor 980 is disposedon the image surface 970.

According to the 9th embodiment, the lens element set includes, in orderfrom an object side to the image side, a first lens element 910, asecond lens element 920, a first optical element 921, a third lenselement 930, a second optical element 931, a third optical element 932,a fourth lens element 940, a fourth optical element 941, a fifth opticalelement 942, a sixth optical element 943 and a fifth lens element 950,wherein the first lens element 910, the second lens element 920, thethird lens element 930, the fourth lens element 940 and the fifth lenselement 950 can be the optical element which is disclosed in theaforementioned 6th embodiment, that is, the imaging lens element canprevent a miss assembling in the assembling process. The first opticalelement 921, the second optical element 931, the third optical element932, the fourth optical element 941, the fifth optical element 942 andthe sixth optical element 943 can be the optical element which isdisclosed in any one of the aforementioned 1st to 5th, and 7thembodiments. In detail, each of the first optical element 921, thesecond optical element 931, the fourth optical element 941 and the sixthoptical element 943 is any one light blocking sheet of the 1stembodiment, the 2nd embodiment, the 3rd embodiment, the 4th embodimentand the 7th embodiment, the third optical element 932 and the fifthoptical element 942 are the light blocking element (spacer) of the 5thembodiment, and will not be limited thereof. Therefore, themanufacturing yield rate and the image quality can be increased byassembling optical elements in a correct way, so that the effect on theimage quality from the stray light can be reduced.

Table 3 shows data of each lens element (910, 920, 930, 940, 950), theIR-cut filter 960 and the image surface 970, wherein the curvatureradius, the thickness and the focal length are shown in millimeters(mm), and surface numbers 0-14 represent the surfaces sequentiallyarranged from the object-side to the image-side along the optical axis.In Table 4, k represents the conic coefficient of the equation of theaspheric surface profiles. A4-A16 represent the aspheric coefficientsranging from the 4th order to the 16th order.

TABLE 3 9th Embodiment f = 3.46 mm, Fno = 2.25, HFOV = 39.9 deg. FocalSurface # Curvature Radius Thickness Material Index Abbe # Length 0Object Plano Infinity 1 Ape. Stop Plano −0.278000  2 Lens 1 1.141 ASP0.487000 Plastic 1.544 55.9 2.37 3 8.509 ASP 0.048000 4 Lens 2 −10.898ASP 0.220000 Plastic 1.639 23.5 −5.31 5 4.965 ASP 0.323000 6 Lens 3−18.414 ASP 0.241000 Plastic 1.639 23.5 −115.82 7 −24.639 ASP 0.520000 8Lens 4 −93.665 ASP 0.473000 Plastic 1.544 55.9 2.54 9 −1.365 ASP0.280000 10 Lens 5 −2.725 ASP 0.307000 Plastic 1.544 55.9 −1.74 11 1.514ASP 0.400000 12 IR-cut filter Plano 0.210000 Glass 1.517 64.2 — 13 Plano0.274721 14 Image Plano — Reference wavelength is 587.6 nm (d-line).

TABLE 4 Aspheric Coefficients Surface # 2 3 4 5 6 k = −3.4401E+001.4225E−01 −8.2890E+01 2.6351E+01 −9.9000E+01 A4 = 2.7519E−01−1.4417E−01 −1.0143E−01 4.5345E−02 −2.9326E−01 A6 = −4.6596E−02−5.6288E−01 1.5292E−01 5.6853E−01 −3.5114E−01 A8 = −1.6721E−014.0542E+00 2.0008E+00 −3.6852E−01 2.1298E+00 A10 = −7.5102E−02−9.6210E+00 −5.3044E+00 −2.7012E−01 −5.6164E+00 A12 = 1.2757E+009.1258E+00 4.0508E+00 1.3056E+00 8.3818E+00 A14 = −1.8902E+00−3.1352E+00 −4.8602E+00 Surface # 7 8 9 10 11 k = −8.9496E+01−9.9000E+01 −1.0520E+01 2.4732E−02 −1.3000E+01 A4 = −2.7674E−017.1448E−02 −1.9396E−02 −3.5725E−02 −1.1909E−01 A6 = 3.5663E−02−9.1146E−02 3.8136E−01 2.0099E−02 6.5475E−02 A8 = 2.2566E−01 1.7478E−02−5.7576E−01 2.6136E−02 −3.0014E−02 A10 = −6.4965E−01 −8.6317E−023.8303E−01 −2.0246E−02 8.8658E−03 A12 = 1.2484E+00 6.9063E−02−1.3509E−01 5.8090E−03 −1.5685E−03 A14 = −6.8854E−01 −1.4041E−022.4499E−02 −7.7133E−04 1.4933E−04 A16 = −1.7942E−03 3.9767E−05−5.7209E−06

FIG. 12 is a schematic view of a lens module 30 according to the 10thembodiment of the present disclosure. According to the 10th embodiment,the lens module 30 includes an imaging lens assembly (not shown) and animage sensor 1080, wherein the imaging lens assembly includes a barrel1000, a lens element set (not shown), an IR-cut filter 1060 and a imagesurface 1070. The lens element set is located in the barrel 1000, theIR-cut filter 1060 and the image surface 1070 are located on an imageside of the lens element set in order, and the image sensor 1080 isdisposed on the image surface 1070.

According to the 10th embodiment, the lens element set includes, inorder from an object side to the image side, a first lens element 1010,a second lens element 1020, a first optical element 1021, a third lenselement 1030, a second optical element 1031, a third optical element1032, a fourth optical element 1033, a fourth lens element 1040, a fifthoptical element 1041, a sixth optical element 1042, a seventh opticalelement 1043 and a fifth lens element 1050, wherein the first lenselement 1010, the second lens element 1020, the third lens element 1030,the fourth lens element 1040 and the fifth lens element 1050 can be theoptical element which is disclosed in the aforementioned 6th embodiment,that is, the imaging lens element can prevent a miss assembling in theassembling process. The first optical element 1021, the second opticalelement 1031, the third optical element 1032, the fourth optical element1033, the fifth optical element 1041, the sixth optical element 1042 andthe seventh optical element 1043 can be the optical element which isdisclosed in any one of the aforementioned 1st to 5th, and 7thembodiments. In detail, each of the first optical element 1021, thesecond optical element 1031, the fourth optical element 1033, the fifthoptical element 1041 and the seventh optical element 1043 is any onelight blocking sheet of the 1st embodiment, the 2nd embodiment, the 3rdembodiment, the 4th embodiment and the 7th embodiment, the third opticalelement 1032 and the sixth optical element 1042 are the light blockingelement (spacer) of the 5th embodiment, and will not be limited thereof.Therefore, the manufacturing yield rate and the image quality can beincreased by assembling optical elements in a correct way, so that theeffect on the image quality from the stray light can be reduced.

Table 5 shows data of each lens element (1010, 1020, 1030, 1040, 1050),the IR-cut filter 1060 and the image surface 1070, wherein the curvatureradius, the thickness and the focal length are shown in millimeters(mm), and surface numbers 0-14 represent the surfaces sequentiallyarranged from the object-side to the image-side along the optical axis.In Table 6, k represents the conic coefficient of the equation of theaspheric surface profiles. A4-A16 represent the aspheric coefficientsranging from the 4th order to the 16th order.

TABLE 5 10th Embodiment f = 3.30 mm, Fno = 2.28, HFOV = 40.4 deg. FocalSurface # Curvature Radius Thickness Material Index Abbe # Length 0Object Plano Infinity 1 Ape. Stop Plano −0.224000  2 Lens 1 1.226 ASP0.412000 Plastic 1.544 55.9 2.63 3 7.602 ASP 0.101000 4 Lens 2 10.744ASP 0.205000 Plastic 1.661 20.4 −5.86 5 2.825 ASP 0.306000 6 Lens 3−13.901 ASP 0.233000 Plastic 1.661 20.4 −52.54 7 −23.338 ASP 0.524000 8Lens 4 11.306 ASP 0.453000 Plastic 1.544 55.9 2.13 9 −1.273 ASP 0.31800010 Lens 5 −3.636 ASP 0.271000 Plastic 1.544 55.9 −1.69 11 1.261 ASP0.400000 12 IR-cut filter Plano 0.210000 Glass 1.517 64.2 — 13 Plano0.331961 14 Image Plano — Reference wavelength is 587.6 nm (d-line).

TABLE 6 Aspheric Coefficients Surface # 2 3 4 5 6 k = −2.7802E−012.4592E+00 −8.9637E+01 −1.8997E+00 2.0000E+01 A4 = 7.5762E−03−1.3668E−01 −1.3286E−01 −6.2324E−02 −3.9979E−01 A6 = −2.0732E−021.2707E−01 5.6211E−01 6.7337E−01 8.9943E−02 A8 = 8.1550E−02 2.8112E−013.1724E−02 −4.8487E−01 4.4677E−01 A10 = −6.9242E−01 −1.6619E+00−1.6589E+00 1.7913E−01 −1.5839E+00 A12 = 1.5115E+00 1.7795E+001.6245E+00 2.8255E−01 2.8836E+00 A14 = −1.6600E+00 −7.9517E−01−1.5670E+00 Surface # 7 8 9 10 11 k = −8.9496E+01 −6.2087E+01−8.6987E+00 −8.7613E+00 −1.1174E+01 A4 = −2.7674E−01 2.4986E−02−9.5913E−02 −3.0705E−01 −1.8423E−01 A6 = 3.5663E−02 −1.9786E−023.4374E−01 3.6024E−01 1.4821E−01 A8 = 2.2566E−01 −4.3640E−02 −3.2650E−01−1.8130E−01 −7.4451E−02 A10 = −6.4965E−01 2.2074E−02 1.5559E−015.0197E−02 2.2964E−02 A12 = 1.2484E+00 −1.0922E−03 −4.2398E−02−7.9930E−03 −4.2803E−03 A14 = −6.8854E−01 −4.7323E−04 6.3123E−036.9220E−04 4.3800E−04 A16 = −3.9396E−04 −2.5434E−05 −1.8651E−05

FIG. 13 is a schematic view of a lens module 40 according to the 11thembodiment of the present disclosure. According to the 11th embodiment,the lens module 40 includes an imaging lens assembly (not shown) and animage sensor 1190, wherein the imaging lens assembly includes a barrel1100, a lens element set (not shown), an IR-cut filter 1170 and a imagesurface 1180. The lens element set is located in the barrel 1100, theIR-cut filter 1170 and the image surface 1180 are located on an imageside of the lens element set in order, and the image sensor 1190 isdisposed on the image surface 1180.

According to the 11th embodiment, the lens element set includes, inorder from an object side to the image side, a first lens element 1110,a first optical element 1111, a second lens element 1120, a secondoptical element 1121, a third lens element 1130, a third optical element1131, a fourth lens element 1140, a fourth optical element 1141, a fifthlens element 1150, a fifth optical element 1151, a sixth optical element1152 and a sixth lens element 1160, wherein the first lens element 1110,the second lens element 1120, the third lens element 1130, the fourthlens element 1140, the fifth lens element 1150 and the sixth lenselement 1160 can be the optical element which is disclosed in theaforementioned 6th embodiment, that is, the imaging lens element canprevent a miss assembling in the assembling process. The first opticalelement 1111, the second optical element 1121, the third optical element1131, the fourth optical element 1141, the fifth optical element 1151and the sixth optical element 1152 can be the optical element which isdisclosed in any one of the aforementioned 1st to 5th, and 7thembodiments. In detail, each of the first optical element 1111, thesecond optical element 1121, the third optical element 1131, the fourthoptical element 1141 and the sixth optical element 1152 is any one lightblocking sheet of the 1st embodiment, the 2nd embodiment, the 3rdembodiment, the 4th embodiment and the 7th embodiment, the fifth opticalelement 1151 is the light blocking element (spacer) of the 5thembodiment, and will not be limited thereof. Therefore, themanufacturing yield rate and the image quality can be increased byassembling optical elements in a correct way, so that the effect on theimage quality from the stray light can be reduced.

Table 7 shows data of each lens element (1110, 1120, 1130, 1140, 1150,1160), the IR-cut filter 1170 and the image surface 1180, wherein thecurvature radius, the thickness and the focal length are shown inmillimeters (mm), and surface numbers 0-16 represent the surfacessequentially arranged from the object-side to the image-side along theoptical axis. In Table 8, k represents the conic coefficient of theequation of the aspheric surface profiles. A4-A16 represent the asphericcoefficients ranging from the 4th order to the 16th order.

TABLE 7 11th Embodiment f = 4.06 mm, Fno = 1.89, HFOV = 39.8 deg. FocalSurface # Curvature Radius Thickness Material Index Abbe # Length 0Object Plano Infinity 1 Ape. Stop Plano −0.367000  2 Lens 1 1.592 ASP0.605000 Plastic 1.544 55.9 3.48 3 8.629 ASP 0.059000 4 Lens 2 10.098ASP 0.230000 Plastic 1.639 23.5 −8.05 5 3.377 ASP 0.336000 6 Lens 38.537 ASP 0.265000 Plastic 1.544 55.9 59.80 7 11.446 ASP 0.190000 8 Lens4 6.931 ASP 0.330000 Plastic 1.639 23.5 −15.78 9 4.032 ASP 0.266000 10Lens 5 −25.689 ASP 0.841000 Plastic 1.544 55.9 2.12 11 −1.115 ASP0.312000 12 Lens 6 −4.059 ASP 0.400000 Plastic 1.535 55.7 −1.99 13 1.490ASP 0.300000 14 IR-cut filter Plano 0.210000 Glass 1.517 64.2 — 15 Plano0.662061 16 Image Plano — Reference wavelength is 587.6 nm (d-line).

TABLE 8 Aspheric Coefficients Surface # 2 3 4 5 6 7 k = −1.1795E+00 −8.9989E+01 −7.5442E+01 −4.1022E+00 −4.7206E+01 −9.0000E+01 A4 =2.1298E−02 −6.9842E−02 −1.0219E−01 −1.1451E−02 −3.0841E−02 −9.2301E−02A6 = 7.7177E−02  5.3215E−02  2.1150E−01  1.1799E−01 −2.4006E−01−2.2449E−02 A8 = −1.6295E−01   1.7503E−02 −1.5382E−01  1.3266E−02 5.5023E−01  9.8410E−02 A10 = 1.7349E−01 −8.7151E−02  5.7102E−02−1.8583E−01 −9.1365E−01 −3.5363E−01 A12 = −9.0071E−02   5.4939E−02 2.1322E−02  2.7648E−01  7.5321E−01  4.4435E−01 A14 = 7.6662E−03−1.5081E−02 −1.4843E−02 −1.0075E−01 −2.0675E−01 −2.0262E−01 A16 = 3.0196E−02 Surface # 8 9 10 11 12 13 k = −1.0000E+00  −2.7947E+01−9.7365E+00 −3.9399E+00 −3.6213E+01 −8.7875E+00 A4 = −2.7717E−01 −2.3007E−01 −1.1707E−01 −9.4597E−02 −9.5534E−02 −6.2164E−02 A6 =3.8715E−01  3.2435E−01  9.0921E−02  6.2733E−02  2.8327E−02  2.2504E−02A8 = −5.5802E−01  −4.2197E−01 −1.1243E−01 −5.0030E−02 −3.5414E−03−6.6427E−03 A10 = 4.8133E−01  3.5584E−01  8.0011E−02  2.6594E−02 5.2867E−04  1.2779E−03 A12 = −1.8717E−01  −1.6503E−01 −2.6434E−02−6.2988E−03 −1.1796E−04 −1.4986E−04 A14 = 1.9752E−02  3.8612E−02 4.0061E−03  6.0335E−04  1.4254E−05  9.5108E−06 A16 = 1.8695E−03−3.6026E−03 −2.2716E−04 −1.6218E−05 −6.2513E−07 −2.4454E−07

FIG. 14 is a schematic view of a lens module 50 according to the 12thembodiment of the present disclosure. According to the 12th embodiment,the lens module 50 includes an imaging lens assembly (not shown) and animage sensor 1280, wherein the imaging lens assembly includes a barrel1200, a lens element set (not shown), an IR-cut filter 1260 and a imagesurface 1270. The lens element set is located in the barrel 1200, theIR-cut filter 1260 and the image surface 1270 are located on an imageside of the lens element set in order, and the image sensor 1280 isdisposed on the image surface 1270.

According to the 12th embodiment, the lens element set includes, inorder from an object side to the image side, a first lens element 1210,a first optical element 1211, a second lens element 1220, a secondoptical element 1221, a third lens element 1230, a third optical element1231, a fourth lens element 1240, a fourth optical element 1241, a fifthoptical element 1242 and a fifth lens element 1150, wherein the firstlens element 1210, the second lens element 1220, the third lens element1230, the fourth lens element 1240 and the fifth lens element 1250 canbe the optical element which is disclosed in the aforementioned 6thembodiment, that is, the imaging lens element can prevent a missassembling in the assembling process. The first optical element 1211,the second optical element 1221, the third optical element 1231, thefourth optical element 1241 and the fifth optical element 1242 can bethe optical element which is disclosed in any one of the aforementioned1st to 5th, and 7th embodiments. In detail, each of the first opticalelement 1211, the second optical element 1221 and the fifth opticalelement 1242 is any one light blocking sheet of the 1st embodiment, the2nd embodiment, the 3rd embodiment, the 4th embodiment and the 7thembodiment, the third optical element 1231 and the fourth opticalelement 1241 are the light blocking element (spacer) of the 5thembodiment, and will not be limited thereof. Therefore, themanufacturing yield rate and the image quality can be increased byassembling optical elements in a correct way, so that the effect on theimage quality from the stray light can be reduced.

Table 9 shows data of each lens element (1210, 1220, 1230, 1240, 1250),the IR-cut filter 1260 and the image surface 1270, wherein the curvatureradius, the thickness and the focal length are shown in millimeters(mm), and surface numbers 0-14 represent the surfaces sequentiallyarranged from the object-side to the image-side along the optical axis.In Table 8, k represents the conic coefficient of the equation of theaspheric surface profiles. A4-A16 represent the aspheric coefficientsranging from the 4th order to the 16th order.

TABLE 9 12th Embodiment f = 3.21 mm, Fno = 2.26, HFOV = 41.9 deg. FocalSurface # Curvature Radius Thickness Material Index Abbe # Length 0Object Plano Infinity 1 Ape. Stop Plano −0.204000  2 Lens 1 1.240 ASP0.397000 Plastic 1.544 56.0 2.76 3 6.319 ASP 0.058000 4 Lens 2 8.006 ASP0.205000 Plastic 1.660 20.4 −7.01 5 2.902 ASP 0.316000 6 Lens 3 −45.910ASP 0.220000 Plastic 1.584 28.2 −23.16 7 19.220 ASP 0.459000 8 Lens 4−151.755 ASP 0.454000 Plastic 1.544 56.0 2.06 9 −1.111 ASP 0.379000 10Lens 5 −4.014 ASP 0.270000 Plastic 1.535 55.8 −1.74 11 1.241 ASP0.400000 12 IR-cut filter Plano 0.210000 Glass 1.517 64.2 — 13 Plano0.364076 14 Image Plano — Reference wavelength is 587.6 nm (d-line).

TABLE 10 Aspheric Coefficients Surface # 2 3 4 5 6 k = −1.1892E+00−7.4533E+01 −3.5502E+01 −6.8390E−01 −9.9000E+01 A4 = 5.3844E−02−2.2876E−01 −2.7687E−01 −1.1270E−01 −5.1592E−01 A6 = 3.9507E−022.5833E−01 1.0106E+00 9.8473E−01 −7.6463E−02 A8 = 1.0139E−02 9.2638E−01−3.0991E−01 −1.5074E+00 1.5587E+00 A10 = −1.2543E+00 −3.8637E+00−1.5949E+00 2.4607E+00 −5.3570E+00 A12 = 3.0469E+00 4.2028E+001.5374E+00 −1.7457E+00 1.1053E+01 A14 = −2.9374E+00 −1.7636E+00−7.3580E+00 Surface # 7 8 9 10 11 k = 2.0000E+01 −9.9000E+01 −6.1922E+00−1.7372E+00 −9.0461E+00 A4 = −4.1502E−01 8.1247E−02 −8.1004E−02−1.5573E−01 −1.4612E−01 A6 = −2.1763E−02 −2.2800E−03 3.7567E−018.8124E−02 9.1062E−02 A8 = 7.5187E−01 −6.7899E−02 −3.2979E−01−3.4093E−03 −4.3716E−02 A10 = −2.1216E+00 5.5796E−02 1.4296E−01−7.8992E−03 1.4609E−02 A12 = 3.4616E+00 −2.1596E−02 −3.5043E−022.3075E−03 −3.2094E−03 A14 = −1.7985E+00 3.1616E−03 4.6568E−03−2.5855E−04 3.9649E−04 A16 = −2.6576E−04 1.0377E−05 −2.0122E−05

Although the present disclosure has been described in considerabledetail with reference to certain embodiments thereof, other embodimentsare possible. Therefore, the spirit and scope of the appended claimsshould not be limited to the description of the embodiments containedherein. It will be apparent to those skilled in the art that variousmodifications and variations can be made to the structure of the presentdisclosure without departing from the scope or spirit of the disclosure.In view of the foregoing, it is intended that the present disclosurecover modifications and variations of this disclosure provided they fallwithin the scope of the following claims.

What is claimed is:
 1. A light blocking sheet, comprising: a firstsurface; a second surface corresponding to the first surface; an innerannular surface connecting the first surface and the second surface, andforming an inner opening; and an outer annular surface connecting anedge of the first surface and an edge of the second surface, andcomprising: at least three notches disposed on the outer annularsurface; and at least three arc surfaces located on the outer annularsurface, wherein the at least three notches and the at least three arcsurfaces are alternately arranged on the outer annular surface, and theat least three arc surfaces are coaxial and have different arc lengths;wherein each of the at least three notches is singlet-symmetric and isformed into a single shape.
 2. The light blocking sheet of claim 1,wherein contours of the notches are the same.
 3. The light blockingsheet of claim 1, wherein a number of the notches is N, and thefollowing condition is satisfied:3≤N<8.
 4. The light blocking sheet of claim 3, wherein the number of thenotches is N, and the following condition is satisfied:N=3.
 5. The light blocking sheet of claim 4, wherein a virtual outercircular arc line is formed between two ends of each of the notches, thevirtual outer circular arc lines are coaxial; wherein for the at leastthree notches, there is a connecting line which is formed between eachmiddle point of the two virtual outer circular arc lines of two notchespassing through a center of the light blocking sheet, and an anglebetween a middle point of the virtual outer circular arc line of theother notch and the middle point of one of the two virtual outercircular arc lines of the two notches which is near to the other notchis θ, and the following condition is satisfied:20 degrees<θ<75 degrees.
 6. The light blocking sheet of claim 1, whereina virtual outer circular arc line is formed between two ends of each ofthe notches, the virtual outer circular arc lines are coaxial, and thereis only one connecting line which is formed between each middle point ofany two virtual outer circular arc lines passing through a center of thelight blocking sheet.
 7. The light blocking sheet of claim 1, whereindepths of the notches are the same.
 8. The light blocking sheet of claim1, wherein a maximal depth of each of the notches is d, and thefollowing condition is satisfied: 0.03 mm<d≤0.15 mm.
 9. An imaging lensassembly, comprising: the light blocking sheet of claim
 1. 10. A lensmodule, comprising: the imaging lens assembly of claim 9; and an imagesensor, wherein the image sensor is disposed on an image surface of theimaging lens assembly.